Adjustable lathe-dog



(No Model.) ,E. A. ANTHONY.

ADJUSTABLE LATHE DOG.

M 7 r H, 1 m m m t. w w m 1% l t d W .Jr t a P 00 III I W 0a.. wwwmwwxum o0 5 W I o .a top plan view of said attachment.

EDVIN A. ANTHONY, OF DIGHTON, MASSACHUSETTS.

ADJUSTABLE LATHE-DOG.

SPECIFICATION forming part of Letters Patent No. 589,889, datedSeptember 14, 1897. Application filed January 14, 1897. Serial No.619,138. (No model.)

To all whom it may concern:

Be it known that I, EDWIN A. ANTHONY, a citizen ofthe United States,residing at North Dighton, in the county of Bristol and State ofMassachusetts, have invented certain new and useful Improvements inAdjustable Dogs; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame. r

This invention relates to improvements in lathe attachments, and hasmore particular relation to lathe-chucks. V

The invention consists of certain novel constructions, combinations,andarrangements of parts, all of which will be hereinafter moreparticularly set forth and claimed.

In the accompanying drawings, forming part of this specification, Figure1 represents a front elevation of the face-plate of thelathe providedwith my invention, a triangular piece of metal being supported by thesame. Fig. 2 represents a similar View, a rectangular piece of metalbeing supported by the chuck. Fig. 3 represents acentral horizontalsection through the same. Fig. 4 represents Fig. 5 represents an endelevation of my said improvement. Fig. 6 represents an enlarged detailperspective view of the pivoted jaw, and Fig. '7 represents an enlargedperspective view of the auxiliary angular jaw adapted to be secured tothe pivoted jaw.

A in the drawings represents the faceplate of the lathe; B, the spacedattaching-plate of my improved chuck; C, the pivoted jaw; D, theauxiliary jaw, and E the adjusting bolt or screw. The said plates B areapproximately U-shaped in formation and are each provided with aV-shaped notch 1). One of said plates is provided with a screw-threadedbolt or shank 17, adapted to be passed through a suitable aperture cutin the face-plate of the lathe and secured in position by a suitablenut. The lower end of the jaw O, which is preferably segmental in shape,is pivotally secured between the lower ends of the spaced plates byabolt19 The inner segmental edge of said jaw O is provided upon each sidewith an inclined groove 0. The said grooves together form a dovetailedprojection along the fit tools of varying shapes.

edge of said jaw. This projection is adapted to enter a dovetailedgroove formed in the auxiliary groove D, so that said jaw may be adjustably mounted upon said dovetailed edge of the jaw (J. The said jaw Dcomprises a segmental block (Z and side metallic plates at, the latterprojecting over the periphery of said block d and incline toward eachother, so as to form a dovetailed groove for the reception of thedovetailed flange of the jaw C. Both the block 01 and the plates d areprovided with V-shaped notches adapted to correspond with V-shapednotches in the spaced plates.

It will be observed from theforegoing de scription that by sliding thejaw D along the dovetailed flange of the jawO the opening between thesaid jaw d and the spaced plates may be adjusted to varying angles, soas to The said jaw D is pulled firmly toward the spaced plates to clampthe tool or metal between it and said plates by the screw-bolt E. Thisbolthas one end pivotally mounted between the upper ends of the spacedplates byabolt b and the opposite end passed through a link or toggle e,pivotally connected to the upper end of the jaw O. A wedge-shaped washerc is applied over said bolt E, so as to be forced forward into contactwith the same by a nutc mounted on said bolt. The office of this washere is to present a flat bearing-surface to the nut e and an inclinedbearing-surface to the toggle E, which is caused to assume an inclinedposition by being forced forward.

It will be observed from the foregoing description that when the nut cis turned forward on the bolt E the jaws C and D will be forced towardthe spaced plates and thus clamp the tool or other metal beneath the jawD and said plates.

Having thus described my invention, what I claim as new,'and desire tosecure by Letters Patent, is v i 1. In a lathe attachment, thecombination with two spaced plates rigidly secured to the face-plate ofthe lathe, of a jaw having one end pivoted between said plates so thatit may be passed between them when adjusted, and adjusting meansconnected to said jaw and having one end mounted between said plates fordrawing said jaw and plates together toclamp an article between them,substantially as described.

2. In a lathe attachment, the combination with spaced plates rigidlysecured to the faceplate of a lathe, of a jaw having one end pivotedbetween said plates so that it may pass between them when adjusted, anauxiliary jaw movably mounted upon said pivoted jaw and the spacedplates whereby the auxiliary jaw may be drawn forward to clamp anarticle between it and the spaced plates, substantially as described.

3. I11 a lathe attachment, the combination with spaced plates adapted tobe secured to the face-plate of the lathe, of a segmental pivoted jawmounted between said spaced plates, a notched segmental auxiliary jaw adjustably mounted on said pivoted jaw and means connecting the pivotedjaw and the spaced plates whereby the two are drawn together to clamp anarticle between the auxiliary jaw and said plates, substantially asdescribed.

4;. In a lathe attachment, the combination with spaced plates adaptedfor attachment to the face-plate of the lathe and provided in one edgewith \l-shaped notches, of a jaw pivotally mounted between said plates,an auxiliary jaw adjustably mounted on said pivoted jaw and providedwith V-shaped notches and means for drawing the spaced plates andpivoted jaw together whereby an article may be clamped between theauxiliary jaw and said spaced plates, substantially as described.

5. In a lathe attachment, the combination with spaced plates adapted tobe secured to the face-plate of the lathe, of a pivoted jaw mountedbetween said plates, a screw-bolt also pivotally mounted between saidplates, an apertured toggle pivotally connected to said pivoted jaw andadapted to receive the screw-bolt and an adj usting-nut mounted on saidscrew-bolt so as to engage the toggle-joint and force the same forwardto clamp an arti cle between the pivoted jaw and the spaced plates,substantially as described.

In testimony whereof I have signed this specification in the presence oftwo subscribing Witnesses.

EDWIN A. ANTHONY.

Vitnesses:

NATHANIEL R. LINCOLN, SAMUEL N. CODDING.

